Thanawan S, Radabutra S, Thamasirianunt P, Amornsakchai T, Suchiva K
Institute of Science and Technology for Research and Development, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand.
Ultramicroscopy. 2009 Jan;109(2):189-92. doi: 10.1016/j.ultramic.2008.10.011. Epub 2008 Nov 5.
Atomic force microscopy (AFM) was used to study the morphology and surface properties of NR/NBR blend. Blends at 1/3, 1/1 and 3/1 weight ratios were prepared in benzene and formed film by casting. AFM phase images of these blends in tapping mode displayed islands in the sea morphology or matrix-dispersed structures. For blend 1/3, NR formed dispersed phase while in blends 1/1 and 3/1 phase inversion was observed. NR showed higher phase shift angle in AFM phase imaging for all blends. This circumstance was governed by adhesion energy hysteresis between the device tip and the rubber surface rather than surface stiffness of the materials, as proved by force distance measurements in the AFM contact mode.
利用原子力显微镜（AFM）研究了天然橡胶（NR）/丁腈橡胶（NBR）共混物的形态和表面性能。按1/3、1/1和3/1的重量比在苯中制备共混物，并通过流延成膜。这些共混物在轻敲模式下的AFM相图显示出海岛状形态或基体分散结构。对于1/3的共混物，NR形成分散相，而在1/1和3/1的共混物中观察到相转变。在所有共混物的AFM相成像中，NR显示出更高的相移角。如AFM接触模式下的力-距离测量所证明的，这种情况是由器件尖端与橡胶表面之间的粘附能滞后决定的，而不是由材料的表面刚度决定的。
